Mouthpiece retainer case



FIG. 1 is a front perspective view of a mouthpiece retainer case in an open position, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is front perspective view of the mouthpiece retainer case in a closed position;

FIG. 9 is a front view thereof;

FIG. 10 is a rear view thereof;

FIG. 11 is a left side view thereof;

FIG. 12 is right side view thereof;

FIG. 13 is a top view thereof;

FIG. 14 is a bottom view thereof;

FIG. 15 is a front perspective view of a mouthpiece retainer case in an open position, showing our new design;

FIG. 16 is a front view thereof;

FIG. 17 is a rear view thereof;

FIG. 18 is a left side view thereof;

FIG. 19 is right side view thereof;

FIG. 20 is a top view thereof;

FIG. 21 is a bottom view thereof;

FIG. 22 is front perspective view of the mouthpiece retainer case in a closed position;

FIG. 23 is a front view thereof;

FIG. 24 is a rear view thereof;

FIG. 25 is a left side view thereof;

FIG. 26 is right side view thereof;

FIG. 27 is a top view thereof; and,

FIG. 28 is a bottom view thereof.

The broken lines shown in the drawings represent unclaimed portions of the mouthpiece retainer case and form no part of the claimed design. 

CLAIM The ornamental design for a mouthpiece retainer case, as shown and described. 